/*******************************************************************************
 * Copyright 2016-2017 Dell Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * @microservice:  export-client
 * @author: Jim White, Dell
 * @version: 1.0.0
 *******************************************************************************/
package org.edgexfoundry.controller;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.web.ErrorAttributes;
import org.springframework.boot.autoconfigure.web.ErrorController;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.ServletRequestAttributes;

@RestController
public class LocalErrorController implements ErrorController {
	private static final String PATH = "/error";

	@Autowired
	private ErrorAttributes errorAttributes;

	@RequestMapping(value = PATH)
	public String error(HttpServletRequest request, HttpServletResponse response) {
		// Appropriate HTTP response code (e.g. 404 or 500) is automatically set
		// by Spring.
		// Here we just define response body.
		Map<String, Object> errorInfo = getErrorAttributes(request, true);
		return errorInfo.get("message") + "\n\n" + errorInfo.get("trace");
	}

	@Override
	public String getErrorPath() {
		return PATH;
	}

	private Map<String, Object> getErrorAttributes(HttpServletRequest request, boolean includeStackTrace) {
		RequestAttributes requestAttributes = new ServletRequestAttributes(request);
		return errorAttributes.getErrorAttributes(requestAttributes, includeStackTrace);
	}

}
